Bookfriends Wirebound flip perpetual desk calendar by Bookfriends. Get your desk up to date with this calendar. You will never have to buy another calendar to keep track of the day and month.  To change the date on the calendar simply select the date by flipping the attached tabs to the proper month, day of the week, and date. You can also use this calendar as a D-DAY calendar. This d-day calendar ideal for counting down to an important event such as a big exam, wedding, birthday, or trip.

• Maximum of 999 days countdown
• Size: 25.2 X 10 cm (9.9 X 3.9 inches)
• Composition:
  - Front: D-Day or D+Day counting
  - Back: Undated calendar